﻿// SAX parser factory.
// http://www.saxproject.org
// No warranty; no copyright -- use this as you will.
// $Id$
using System;
using java = biz.ritter.javapi;

namespace org.xml.sax.helpers
{
    /**
     * Java-specific class for dynamically loading SAX parsers.
     *
     * <blockquote>
     * <em>This module, both source code and documentation, is in the
     * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
     * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
     * for further information.
     * </blockquote>
     *
     * <p><strong>Note:</strong> This class is designed to work with the now-deprecated
     * SAX1 {@link org.xml.sax.Parser Parser} class.  SAX2 applications should use
     * {@link org.xml.sax.helpers.XMLReaderFactory XMLReaderFactory} instead.</p>
     *
     * <p>ParserFactory is not part of the platform-independent definition
     * of SAX; it is an additional convenience class designed
     * specifically for Java XML application writers.  SAX applications
     * can use the static methods in this class to allocate a SAX parser
     * dynamically at run-time based either on the value of the
     * `org.xml.sax.parser' system property or on a string containing the class
     * name.</p>
     *
     * <p>Note that the application still requires an XML parser that
     * implements SAX1.</p>
     *
     * @deprecated This class works with the deprecated
     *             {@link org.xml.sax.Parser Parser}
     *             interface.
     * @since SAX 1.0
     * @author David Megginson
     * @version 2.0.1 (sax2r2)
     */
    public class ParserFactory
    {


        /**
         * Private null constructor.
         */
        private ParserFactory()
        {
        }


        /**
         * Create a new SAX parser using the `org.xml.sax.parser' system property.
         *
         * <p>The named class must exist and must implement the
         * {@link org.xml.sax.Parser Parser} interface.</p>
         *
         * @exception java.lang.NullPointerException There is no value
         *            for the `org.xml.sax.parser' system property.
         * @exception java.lang.ClassNotFoundException The SAX parser
         *            class was not found (check your CLASSPATH).
         * @exception IllegalAccessException The SAX parser class was
         *            found, but you do not have permission to load
         *            it.
         * @exception InstantiationException The SAX parser class was
         *            found but could not be instantiated.
         * @exception java.lang.ClassCastException The SAX parser class
         *            was found and instantiated, but does not implement
         *            org.xml.sax.Parser.
         * @see #makeParser(java.lang.String)
         * @see org.xml.sax.Parser
         */
        public static Parser makeParser()/*
    throws ClassNotFoundException,
    IllegalAccessException, 
    InstantiationException,
    NullPointerException,
    ClassCastException*/
        {
            String className = java.lang.SystemJ.getProperty("org.xml.sax.parser");
            if (className == null)
            {
                throw new java.lang.NullPointerException("No value for sax.parser property");
            }
            else
            {
                return makeParser(className);
            }
        }


        /**
         * Create a new SAX parser object using the class name provided.
         *
         * <p>The named class must exist and must implement the
         * {@link org.xml.sax.Parser Parser} interface.</p>
         *
         * @param className A string containing the name of the
         *                  SAX parser class.
         * @exception java.lang.ClassNotFoundException The SAX parser
         *            class was not found (check your CLASSPATH).
         * @exception IllegalAccessException The SAX parser class was
         *            found, but you do not have permission to load
         *            it.
         * @exception InstantiationException The SAX parser class was
         *            found but could not be instantiated.
         * @exception java.lang.ClassCastException The SAX parser class
         *            was found and instantiated, but does not implement
         *            org.xml.sax.Parser.
         * @see #makeParser()
         * @see org.xml.sax.Parser
         */
        public static Parser makeParser(String className)/*
    throws ClassNotFoundException,
    IllegalAccessException, 
    InstantiationException,
    ClassCastException*/
        {
            return (Parser)NewInstance.newInstance(
                NewInstance.getClassLoader(), className);
        }

    }

}